internal/rosa: LLVM-specific arch name

This is different from linuxArch for PowerPC. While the alternative
usually works fine, compiling compiler-rt builtins produces no output
with linuxArch. The musl installation also uses this name.

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 20 insertions, 5 deletions

diff --git a/internal/rosa/rosa.go b/internal/rosa/rosa.go
index 5f487bb7..c730127b 100644
--- a/internal/rosa/rosa.go
+++ b/internal/rosa/rosa.go
@@ -60,24 +60,39 @@ func linuxArch(arch string) string {
 		return "x86_64"
 	case "arm64":
 		return "aarch64"
-	case "riscv64":
-		return "riscv64"
+
+	case "ppc64le", "riscv64":
+		return arch
 
 	default:
 		panic("unsupported target " + arch)
 	}
 }
 
+// llvmArch returns the LLVM target-triple-specific name corresponding to arch.
+func llvmArch(arch string) string {
+	switch arch {
+	case "ppc64le":
+		return "powerpc64le"
+
+	default:
+		return linuxArch(arch)
+	}
+}
+
 // linuxArch returns the architecture name used by linux corresponding to arch.
-func (s *S) linuxArch() string { return linuxArch(s.arch) }
+func (s *S) linuxArch() string { return linuxArch(s.Arch()) }
+
+// llvmArch returns the LLVM target-triple-specific name corresponding to arch.
+func (s *S) llvmArch() string { return llvmArch(s.Arch()) }
 
 // triple returns the Rosa OS host triple corresponding to arch.
 func triple(arch string) string {
-	return linuxArch(arch) + "-rosa-linux-musl"
+	return llvmArch(arch) + "-rosa-linux-musl"
 }
 
 // triple returns the Rosa OS target triple corresponding to arch.
-func (s *S) triple() string { return triple(s.arch) }
+func (s *S) triple() string { return triple(s.Arch()) }
 
 // earlyLDFLAGS returns LDFLAGS corresponding to triplet.
 func (s *S) earlyLDFLAGS(static bool) string {